继 TensorFlow 更新后，PyTorch 也迎来了最新的 1.4 版。本次更新是最后一个支持 Python2 的版本，同时增加了对分布式模型并行、移动端、Java 程序等方面的支持。
<section style="box-sizing: border-box;padding: 0.5em;font-size: 14px;color: rgb(169, 183, 198);line-height: 18px;border-radius: 0px;background: rgb(40, 43, 46);display: block;font-family: Consolas, Inconsolata, Courier, monospace;overflow: auto;letter-spacing: 0px;margin-left: 8px;margin-right: 8px;overflow-wrap: normal !important;word-break: normal !important;">>>> <span style="box-sizing: border-box;font-size: inherit;color: rgb(248, 35, 117);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">import</span> torch<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> <span style="box-sizing: border-box;font-size: inherit;color: rgb(248, 35, 117);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">from</span> torch.optim <span style="box-sizing: border-box;font-size: inherit;color: rgb(248, 35, 117);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">import</span> SGD<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> <span style="box-sizing: border-box;font-size: inherit;color: rgb(248, 35, 117);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">from</span> torch.optim.lr_scheduler <span style="box-sizing: border-box;font-size: inherit;color: rgb(248, 35, 117);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">import</span> ExponentialLR, StepLR<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> model = [torch.nn.Parameter(torch.randn(<span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">2</span>, <span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">2</span>, requires_grad=<span style="box-sizing: border-box;font-size: inherit;color: rgb(248, 35, 117);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">True</span>))]<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> optimizer = SGD(model, <span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0.1</span>)<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> scheduler1 = ExponentialLR(optimizer, gamma=<span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0.9</span>)<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> scheduler2 = StepLR(optimizer, step_size=<span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">3</span>, gamma=<span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0.1</span>)<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> <span style="box-sizing: border-box;font-size: inherit;color: rgb(248, 35, 117);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">for</span> epoch <span style="box-sizing: border-box;font-size: inherit;color: rgb(248, 35, 117);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">in</span> range(<span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">4</span>):<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> print(epoch, scheduler2.get_last_lr()[<span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0</span>])<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> optimizer.step()<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> scheduler1.step()<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" />>>> scheduler2.step()<br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" /><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" /><span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0</span> <span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0.1</span><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" /><span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">1</span> <span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0.09000000000000001</span><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" /><span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">2</span> <span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0.08100000000000002</span><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" /><span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">3</span> <span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0.00729000000000002</span><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" /><span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">4</span> <span style="box-sizing: border-box;font-size: inherit;color: rgb(174, 135, 250);line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;">0.00656100000000002</span><br style="box-sizing: border-box;font-size: inherit;color: inherit;line-height: inherit;overflow-wrap: inherit !important;word-break: inherit !important;" /></section>-
Torch::nn modules：包括卷积层、池化层、损失层、归一化层、激活层、Dropout 层、嵌入层等。
-
Torch::nn::functional functions：包括卷积、池化、损失、归一化、相似度等方面的函数。
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